Some people believe that preserving natural environment is crucial. However, most make no effort to do so. Why do you think this is happening? What are some simple actions that could help the environment?

Fig
. 10 shows the microscopic structures of the control and bacterial
specimens
investigated by electron microscopy analysis. Many voids could be observed in the control
specimens
Fig
. 10 (a).
However
, in all the bacterial
specimens
, not only were the
calcium
carbonate
crystals formed and distributed on the concrete matrix, but they
also
filled the pores of the Leca (LWA). The CaCO3 precipitation on lightweight
fiber
Change the spelling
fibre
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concrete caused by the four
bacteria
was distributed slightly differently. In
Fig
. 10 (b and d), it appears that less
calcium
carbonate
was formed when SP and SU were used, and these crystals were loosely linked with each other. In
Fig
. 10 (c and e),
in contrast
, BL and BM created denser distribution in the concrete
specimens
due to the larger amount of
calcium
carbonate
formed by the assembly of many small-sized CaCO3 crystals. The results of the EDX analyses indicated the elemental composition with peaks confirming that the
bacteria
had caused
calcium
carbonate
precipitation. In the
specimens
with BL and BM, higher peaks of Ca were observed. In
Fig
. 11 (a), the SEM observation reveals that the
fiber
Change the spelling
fibre
show examples
in the control samples resulted in the phenomenon of balling, which created more pores.
Fig
. 11 (b, c, and d) show that the activity of the microbial strain decreased balling in the samples containing 1%
fiber
Change the spelling
fibre
show examples
, and caused
suitable
Add an article
the suitable
show examples
distribution of the
fibers
Change the spelling
fibres
show examples
in the matrix so that they were separated from each other to fill the pores.
In addition
, the masses of
bacteria
in different SEM scales illustrated in
Fig
. 12 seem to have improved the concrete by being placed between the gaps and filling the cracks.
Moreover
, a huge mass of bacilli-shaped
bacteria
(BL) is visible
in
Change preposition
on
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Correct article usage
a nano
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nano scale
Correct your spelling
nanoscale
show examples
.
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Include an introduction and conclusion

A conclusion is essential for IELTS writing task 2. It is more important than most people realise. You will be penalised for missing a conclusion in your IELTS essay.

The easiest paragraph to write in an essay is the conclusion paragraph. This is because the paragraph mostly contains information that has already been presented in the essay – it is just the repetition of some information written in the introduction paragraph and supporting paragraphs.

The conclusion paragraph only has 3 sentences:

  • Summary
  • Restatement of thesis
  • Prediction or recommendation

Example:

To summarize, a robotic teacher does not have the necessary disciple to properly give instructions to students and actually works to retard the ability of a student to comprehend new lessons. Therefore, it is clear that the idea of running a classroom completely by a machine cannot be supported. After thorough analysis on this subject, it is predicted that the adverse effects of the debate over technology-driven teaching will always be greater than the positive effects, and because of this, classroom teachers will never be substituted for technology.

Start your conclusion with a linking phrase. Here are some examples:

  • In conclusion
  • To conclude
  • To summarize
  • Finally
  • In a nutshell
  • In general

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